docs: def _load_fsLR_atlasroi_for_size(size, sid=100610):
      '''
      Loads the appropriate atlas for the given size of data; size should be the number of stored
      vertices and sub-corticel voxels stored in the cifti file.
      '''
      from .core import subject
      # it doesn't matter what subject we request, so just use any one
      fls = _load_fsLR_atlasroi_for_size.sizes
      if size not in fls: raise ValueError('unknown fs_LR atlas size: %s' % size)
      (n,fls) = _load_fsLR_atlasroi_for_size.sizes[size]
      fl = os.path.join(subject(sid).path, 'MNINonLinear', *fls)
      dat = {'id':sid, 'cifti':True, 'hemi':('lh_LR%dk_MSMAll' % n ,'rh_LR%dk_MSMAll' % n)}
      return _load_fsLR_atlasroi(fl, dat)